Lock butt for asphalt shingles



N. R. BARTLETT July 5,1927. 1,634,972

LOCK BUTT FOR ASPHALT SHINGLES 1 Filed Marchl ll 1925 2 sheets-sh t; 1

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July 5,1927. 1,634,972

N. RBARTLETT LOCK BUTT FOR ASPHALT SHINGLES Filed March 1 1, 1926 2 Sheets-Sheet 2 Jig. 5.

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By Wan/u; 44 am.

A TTORNE Y.

Patented July 5. 1927.. i

' UNITED STATES NEWELL R. BARTLETT, OF SPB-INGFIEL D, MASSACHUSETTS.

'FFl-QE;

1 LOCK Bnmrnoa ASPHALT sn nenns.

' Application 'filed March 11, 1926. Serial No. 93,386.

This invention relates to improvements 1n lock butts for shingles particularly of the type of shingle known as prepared roo'fform the butt ends of the shinglesthat they 7 maybe aligned accurately with each other. A further object of the invention is to so form the shingles that they may be firmly locked together at the buttcnd for covering the securing nails.

A further. object is to securely lock the I shingles together bymeans of one or more inturned tongues thatwill engage thelower inclined edges at. a point removed from the meeting corners or angles of the adjacent shingles. This .permitsthe lower edges of the shingle to be easily raised and the looking tongues readily inserted thereunder and the overlapping shingle drawn ,upwardinto thelocking position. Heretoforeit has been a common practicefto form the shingle with a single tongue that is bent under the body of the shingle which tongue is inserteddirectly under the meeting corners or angles f-adjacent corners below the under layer.

, This construction isobjectional on account ofthe difiicultyin raising the lower shingles "for inserting the tongue. Other lo eking devices are employed which do not extend under the shingle..- The invention, in general, comprises different-forms orjmodifications of the locking tongues as willbe set out in the body 10f the specification; The invention embodies three thicknesses of the shingle material at the locking pointsfl Referring to the drawings i Fig. 1 is a plan view ofone of the shingles or blanks showing twofslits in the corner which intersect each other and extend beyond 7 A the point of intersection.

Fig.2 is a similar view to Fig. 1 with the corner piece removed.

Fig. 3 indicates the two locking tongues bent backward and under the body of the shingle. V

Fig. 4; is a sectional view on the line .4-4of Fig. 3.

Fig. 5 is a sectional view on the line 55 of Fig. 3 showing the bent under tonguesI Fig. 6 is a view of one 7 of the under gles before tbejupper layer is applied as shown in 8, and

layers Fig. 10 illustrates the layer at'the lower...

or edge "p art'of the roof employingthe pieces as shown in Fig. 6.

Referringto-the drawings in detail: V 1 designates "one ofthe shingle elements having the two slits Qand 3-eut therein and parallel w th th'e'sid es 4 and 5 which inter-' sect at 2 and eXtendbeyond the point of The dotted lines 7 and Sillustrate the folding or bending line of the locking tongue' portions 9 and 1 0, which are folded under the shingle part as indicated in Fig. 3 by the dotted lines 11 and 12 leaving 'the corner of the shingle with the projecting part-l3. The bent under tongues 9 and 10 are'shown in the sectional views in 4 and Fig. 5 or in other words these tongues are locking elements. 1 i

Fig. 6 illustrates one of the shingle'ele ments having a portion that is folded under upon itself as'indieated'by the part 20." The lower "corners ot'this are cut ofl at angles to the sides producing'theends22 and 23. 9.2". and 23 are slits for receiving the looking tongues 9 and 10 when assembled. L The ends of these shingles are cut on the lines 22 and 23 7 i Fig. 9 illustrates several of' the shingle elements laid on a longitudinal linegsimil'ar tothe way they are laidon aroof with the apex or corner portions 24; 24 adiacent each other. 25 indicates the nails for holding the shingles 1 in place. Next a second layer of shingles ind cated in Fig. 8 by the numerals 1 is placed over the shingles indicated at The locking tongue elements 9 and 10 are slipped under the lower edges 26 and 27. These locking tongues it should be stated Q are spaced some distance from the apex 28 u when inserted whereby theedges 26 and 27 v may be readily elevated and the tongues inserted under the shin gles indicated at 1. The

shingle'l is then drawn upward into the positions shown. The projecting part ti-i then occupies the space between the lower edges 96 and 27. This part may be removed by punch cutters operating on the dotted lines 2 and 3' of: Fig. 1.

it will be noticed that the shingles 1' over lap the securing nail heads 25. The notched edges oi" the shingles l which are parallel with the sides at and permit the accurate aligrnnent ot the shingle elements 1 and 1, as the edges :29 and 80, see Fig. 8. are parallel with the sides 1 and 5 permitting accurate alignment with the edges 26 and 27 as shown in Fig. 8.

Referring to Fig. which embodies the arrangement of: the structure shown in Figs. (3 and 7 :tor the lower edge of the roof. The elements 1 see Fig. 6, several of which are arranged as shown with the bent under p0rtion and through which nails are driven for securing these shingles in place. The next operation is placing one ot the shingle elei'nents 1 indicated in l to 3 over the elements 1 with the tongue portions t) and 10 entering the slits 2:2 and 223 shown in Fig. (3. This layer of shingles 1' covers the nail heads and etlectually locks this upper layer to the lower layer 1.. Itwill be seen the i'ore that there are three thicknesses of material at the locking part. It will also be seen that by means of the slits 2 and 3 that the corner of the shingle may be bent to form locking tongues of various lengths and shapes, since the slits may be cut at dill'erent distances from the sides of the shingle element.

The line represents the line at the bottom or lower edge of the roof.

It will be noticed that each shingle is secured by four nails and that the locking tongues secure each shingle at spaced points.

It would be necessary to destroy each lock in order to disengage the adjacent shingle. Also that the breaking of: one locking ton gue will not destroy the etiiciency of the other re- .inaiuing locking tongues. As the locking tongues are at right angles to the shingles the tension is therefore in two directions. lit; is alsopossible by varying the size and position ot' the locking tongues 9 and 10 so that when the shingles are laid the overlap of the edges of one shingle over the one below may be varied in order to properly protect the joints.

This construction of nailing and locking the edges of each shingle to ether makes the root when completed, lay tlat. without bulging up at the locking points.

What I claim is:

l. A shingle having a corner part thereof notched and slitted. the slits extending beyond the inner corner ot the notch to provide integral butt loclting and loldahle tongues, parallel with the side edges ot the shingle, said tongues being spaced from the corner of the shingle when folded whereby when a plurality of the shingles are assembled in overlapping relation, the said tongues will engage the adjacent edges of the lower layer of shingles at substantialdistances from the apices of the adjacent lower shinglesxto permit the lower edges of the lower shingle to be elevated for the insertion of the folded tongues and For aligning the shingle, as described.

A. flexible shingle element formed with intersecting slits which are parallel to the adjacent sides of said (Eltllltllbillltl extei'iding past their intersecting points whereby the material of the ;hingle .n'lay be bent bacle ward and parallel with the adjacent side to form a locking tongue.

3. A shingle element tornied with intersecting slits at an angle to the adjacent sides oil? the shingle and extending past their intersecting point, whereby the .iiiaterial of the shingle may be bent lmclcward parallel with the adjacent sides to tot-n11 locking tongues, as described. t

i. A rectangular sha wd shingle element that is formed with a rectangular shaped cut away portion at one corner, the body part of the shingle element having slits which extend inwardly from the inner corner of the cut away portion to permit the material, oil the body part to be folded l11\\'d,l'(l and parallel to the body part for :liorniing loching tongues for aligning purposes when the shingle elements are assembled and which 'l'olded tongues are located. under the lower edge of an underh'ing shingle element at a distance from its corner portion.

NEWELL n. alam 

